Hydraulic air-pump.



A. s. GRAY. HYDRAULIC AIR PUMP. APPLICATION FILED 1A1. 15, 1908..

907 ,341 1 Patented Dec. 22, 1908.

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atkwmup ALBERT S. GRAY, OF GRAND RAPIDS, MICHIGAN.

HYDRAULIC AIR-PUMP.

Specification of Letters Patent,

Patented Dec. 22, 1908.

Application filed January 15, 1908. Serial N 0. 410,986.

To aZZ whom it may concern.-

Be it known that I, ALBERT S. GRAY, a citizen of the United States,residing at Grand Rapids, in the county of Kent and- State of Mlchi an,have invented a new and useful Hydrau ic AirPump, of which the followingis a specification.

The object of this invention is to provide an improved form of valve foruse with a hydraulic air pump.

A further object of the invention is to provide an improved form ofhydraulic air ump especially arranged for use with the va ve.

With these and other objects in view, as will more fully hereinafterappear, the invention consists in certain nove features of constructionand arrangement of parts, hereinafter fully described, illustrated inthe accompanying drawings, and particularly pointed out in the appendedclaims, it being understood that various changes in the form,proportions, size and minor details of the structure may be made withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

In the accompanying drawings w-Figure 1 is an elevation of an air pumpconstructed in accordance with the invention, parts being broken away inorder to more clearly illus trate the details. Figs. 2 and 3 are detailsectional views of the valve for controlling the fluid under pressurethat is employed for actuating the pumping devices.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures of the drawlIl S.

The air pumping apparatus comprises a pair of air pumps 10 and 11, eachof which consists of a lower water tank 15 and an air bell 16. Arrangedin one of the tanks is a vertical cylinder 17, and in the other tank isa cylinder 18. Each of these tanks is rovided with a piston 19 that isconnected ya rod 20 to the top of the air bell, and when fluid underpressure is admitted to the lower end of the cylinder, the piston willbe forced up and will carry with it the air bell, air being drawn in tothe upper portion of the bell through a one-way valve 21, whichautomatically closes as soon as the bell starts to descend. Arrangedbetween the two cylin ders is a valve casing 25 that is divided by acentral block 26 into two chambers 27 and 28. The upper chamber 27communicates With the lower end of the cylinder 18 through a pipe 29,and the lower chamber 28 communicates with the lower end of the cylinder17 through a pipe 30. Leading into one end of the valve casing is awater pipe 32, through which water is forced from any suitable source ofsupply, and leading from theopposite end of the cylinder is a dischargepipe 33 that is connected to the upper portions of the air ump tanks, soas to replenish the water tierein. The waste water flows off through adischarge pipe 34. Arranged in the valve casing are two valves 37 and38, the valve 37 having two ports 39 and 40, and the valve 38 having twoports 41 and 42. These valves are connected by rods 43 to a three armedlever 44 that is pivoted on a standard 45 carried b the valve casing.The central arm of the ever extends up and is provided with a weight 46that operates to move the valves to the final position as soon as theweighted arm of the lever is shifted beyond the vertical plane of thelever pivot.

At any suitable point above the air pumps are arranged a series ofsheaves 50, and over these are guided two chains or cords 51 and 52. Oneend of each cord or chain is connected to one of the air ump bells, andthe opposite end to one of t 1e arms of the valve operating lever 44, sothat as the bells move, the valves will be shifted for the purpose ofcontrolling the flow of the water to and from the cylinders 17 and 18.

In the operation of this portion of the mechanism, the valve is in theposition shown in Fig. 3, and the water entering under pressure throughthe pi e 32 will flow through the valve port 40 to t e chamber 27, andthence through pipe 29 to the lower end of the cylinder 18, therebyraising the piston in said cylinder, and forcing the air pump bell'up toits highest point. During this operation, the opposite bell isdescending and is forcing the air out through a pipe 53. When the bellapproaches the limit of its downward movement, the cord 51 will operateon the lever 44 of the valve mechanism and will shift the valve, theweighted arm of the valve operating lever being moved across thevertical plane of the lever pivot and the weight 46 then acting tocomplete the valve movement, so that the valve is shifted to theposition shown in Fig. 3. During this downward movement of the bell, thewater is gradually forced out from the cylinder 17 and passes throughthe pipe 30 and port 41 of the valve 38 to the discharge pipe 33.

After the valve has been shifted to the position shown in Fig. 2, thewater under pressure entering through the pipe 32 flows through the port39 and valve 37 to the chamber 28, thence through pipe 30 to the lowerend of the cylinder 17 and elevates the piston therein, causing the airbell to move upward to its fullest extent and draw in air through thecheck valve 21. The other bell is, also, descending,'and the water isflowing out from the cylinder 18 through the pipe 29, the chamber 27,and through port 42 of valve 38 to the dischargepipe 33, the air in saidbell being forced outward through the pipe 54.

I claim 1. In a hydraulic air pump, the combination of a casing providedwith a pair of pressure chambers and inlet and outlet connec tions, avalve adjacent said inlet connection and arranged to admit fluidpressure to one of said chambers, and a second valve adjacent saidoutlet and arranged to permit fluid pressure to pass from theother ofsaid chambers, said valves being provided with a pair of ports havinginlet ends in juxtaposition and on the same face of the valve and outletends opening from opposite ends of said valve.

2. In a hydraulic air pump, the combination of a casing provided with'apair of pressure chambers and inlet and outlet connections, valves eachprovided with a pair of ports held to slide opposite said connection andeach having inlet ends in juxtaposition and on the same face of thevalve, and outlet ends opening from opposite ends of said valve topermit communication through one of said chambers.

3. In a hydraulic air pump, the combination of a casing provided with apair of pressure chambers and inlet and outlet connections, saidpressure chambers being separated by a partition provided with a pair ofopenings extending from one of said chambers to the other and in linewith said inlet and outlet, a pair of slide valves arranged to move insaid openings, each of said. valves being provided with a pair of portshaving inlet ends in juxtaposition and on the same face of the valve,and outlet ends opening from opposite ends of the said valve to permitthe passage of fluid pressure to one of said chamers, and the passage offluid pressure from the other of said chambers, and means for shiftingthe position of said valves simultaneously and reversing the flow ofsaid fluid pressure.

4. In an apparatus of the character described the combination of a pairof alternately operable air pumps, each including a movable bell, fluidpressure cylinders, pistons arranged therein and connected to the bellsfor elevating the latter, a valve chamber having fluid pressure andexhaust ports, connections between said valve chamber and the twocylinders, a pair of valves each provided with a pair of ports havinginlet ends in juxtaposition and on the same face of the valve, andoutlet ends opening from opposite ends of the said valve arranged insaid chamber and controlling the flow of the actuating fluid to and fromthe two cylinders, means under the control of the bells for shifting thevalves, and air pipes leading from the bells.

5. In an apparatus of the character described the combination of a pairof alternately operable air pumps, each including a movable bell, a pairof cylinders, pistons arranged therein and connected to the bells, avalve casing having fluid pressure and exhaust ports, connectionsbetween said valve chamber and the cylinders, a pair of valves eachprovided with a pair of ports having inlet ends in juxtaposition and onthe same face of the valve, and outlet ends opening from opposite endsof the said valve arranged in said chamber and controlling the flow ofthe fluid to and from the cylinders, a weighted lever connected to thetwo valves, flexible connections between said lever and the movablebells, and air pipes leading from the air pumps.

6. In an apparatus of the character described the combination of a pairof alternately operable air pumps, each including a movable bell, a pairof cylinders arranged in the air pump, pistons disposed in the cylindersand connected to the bells, a valve casing having inlet and exhaustports for a fluid under pressure, a central block dividing the same intoupper and lower chambers, a pair of slide valves arranged in the valvecasing, and each provided with a pair of ports having inlet ends injuxtaposition and on the same face of the valve, and outlet ends openingfrom opposite ends of the said valve, one of the valves controlling theadmission and the other the exhaust of the fluid, pipes connecting thechambers to the lower ends of the cylinders, a pivotally mounted threearmed lever, two of the arms being connected to the valve and the otherarm being rigid to com plete the valve movement, flexible connectionsbetween the lever and movable bells, air pipes leading from the airpump, and a connection between the exhaust port of the valve casing andthe air pump tanks.

In testimony that I claim the foregoing as my own, I have heretoafi'ixed my signature in the presence of two witnesses.

, ALBERT S. GRAY.

